Previously, Dexter joined the Mitchells for one seriously funked up Thanksgiving and ended up threatening to kill Arthur with a carving knife. Meanwhile, Rita was kissing Elliott in the kitchen and regretting it. Also, Christine graduated from being super annoying to super sketchy when she made a comment about Lundy's crime scene that she couldn't have known. Oh, and also when we saw that she's Trinity's daughter.
We open on a close-up of a syringe with Dexter's face hovering behind it. Dexter's Voice-Over (DVO) is being all ominous and weird about it, which makes us think he's prepping for a kill. But no, it's only Harrison getting his inoculations. Damn, now Dexter's gonna have to worry about Jenny McCarthy and the anti-vaccine psychos too? Like he hasn't already been overburdened this season. Rita's brush with lip-infidelity last week seems to have brought her bitchitude roaring back, as she seems peeved that Dexter isn't more of an emotional basket case (like she is) over poor Harrison's plight. Dex obliges by sweet-talking Harrison through the next injection.
That night, we see Dexter has gone and rented out a shipping container to house his various serial-killing paraphernalia and bric-a-brac. As DVO reminds us, it's a lot more secure than a shed in the backyard. Wow, so that little plot device was short-lived. And this now just makes one more thing for Rita (or Deb) to discover that'll make Dex look suspicious. Whatever, moving on. For what seems like the fiftieth week in a row, Dexter has committed himself to killing Trinity. TONIGHT.
Cut to Dexter following Arthur in his car. The plan is to abduct him in the parking lot outside church choir practice, but Art throws a curveball when he drives right past the church. And so, much like the night Dexter discovered Arthur lived in the 'burbs with a (seemingly) happy family, Dexter follows Arthur into the night, not knowing where he's headed. We end up in a parking garage, where Dexter continues to stay out of Arthur's sight. Arthur's too busy staring intently at a mother and her two grade-school-aged children to notice anyway. We've seen Trinity in stalk mode before, so we know this can't end well. But is he looking for another bathtub girl? This mother is young, but not that young. She'd more fit the profile of the suicide jumper, but the cycle isn't there yet. Hey, why don't I stop armchair-serial-killing and follow the story, huh? (Also, apparently the woman is a babysitter or stepmom or something, so I guess we are being led to believe she's a potential bathtub victim, ANYWAY.)